WO2003096511A1 - Power supply system for island networks - Google Patents

Power supply system for island networks Download PDF

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Publication number
WO2003096511A1
WO2003096511A1 PCT/DE2003/001397 DE0301397W WO03096511A1 WO 2003096511 A1 WO2003096511 A1 WO 2003096511A1 DE 0301397 W DE0301397 W DE 0301397W WO 03096511 A1 WO03096511 A1 WO 03096511A1
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WO
WIPO (PCT)
Prior art keywords
phase
systems
generator
supply system
energy supply
Prior art date
Application number
PCT/DE2003/001397
Other languages
German (de)
French (fr)
Inventor
Vemund Karstad
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to JP2004504367A priority Critical patent/JP3987529B2/en
Priority to AU2003232617A priority patent/AU2003232617A1/en
Priority to KR1020047017907A priority patent/KR101027301B1/en
Publication of WO2003096511A1 publication Critical patent/WO2003096511A1/en
Priority to NO20045340A priority patent/NO328312B1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
    • H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network

Definitions

  • the invention relates to an energy supply system for island networks, the energy supply system having at least one generator and at least two three-phase systems.
  • An energy supply system for island grids is to be understood as a holistic energy system, i.e. an energy system in which electrical energy is generated, transmitted and finally converted back into other forms of energy, the system being spatially limited in size and not comparable to a nationwide energy supply.
  • Such systems can be found, in particular, at sea-bound and / or movable devices. So e.g. on ships and other sea vehicles, drilling platforms or other isolated, preferably sea-bound technical facilities with energy requirements.
  • Generic energy supply systems often have at least two electrically phase-shifted three-phase systems which supply drives with electrical energy by means of converters connected in parallel.
  • the phase offset of the three-phase systems reduces current and voltage harmonics.
  • Such offset three-phase systems are currently produced by converter transformers, the phase shift of the three-phase systems being effected by appropriate selection of switching groups.
  • the object of the invention is to further improve an energy supply system for island grids which has at least one generator and at least two three-phase systems, in particular with regard to the problem described above.
  • the generator of the energy supply system has at least two three-phase winding systems, each of which is assigned to the three-phase system, voltages being induced in the winding systems and the winding systems of the generator being spatially arranged such that the voltages of the two three-phase systems are electrically phase-shifted from one another are.
  • converter transformers for generating the two three-phase systems are completely or at least largely dispensed with, there is a considerable weight and cost advantage and space is also saved.
  • the electrical phase offset between the three-phase systems is advantageously 30 °. This phase shift is particularly favorable with regard to the reduction of current and voltage harmonics in a further three-phase system which may be connected downstream and is connected by means of converters connected in parallel.
  • the winding systems of the generator are preferably installed in slots in such a way that a minimal short-circuit current is established. In this way, unwanted energy supply is significantly reduced by stator-side magnetic coupling of the winding systems in the generator.
  • a load it is appropriate for a load to be connected to more than one of the three-phase systems. Especially when there are more than two or a multiple of two rotary power systems A loss of redundancy in the system can be avoided in this way.
  • the energy supply system advantageously has at least one primary system and at least one secondary three-phase system, at least two three-phase systems forming the primary system, which is coupled to at least one of the secondary three-phase systems.
  • different switching and / or converting devices that are designed for different voltage ranges can be used in the primary and secondary system.
  • the design for voltage ranges is preferably determined by the loads to be supplied. Overall, this results in a cost advantage since, if necessary, cheaper devices can be used for lower voltage ranges.
  • the secondary three-phase system is advantageously coupled to a generator. This ensures that loads on the secondary or primary system can also be supplied with energy if faults occur in the other system when generating energy.
  • the coupling between at least one primary system and at least one secondary three-phase system is preferably designed in such a way that by means of the secondary system
  • Three-phase system coupled generator generated energy can be fed to the primary system.
  • a generator connected to the secondary system can also supply loads connected to the primary system with energy in emergencies.
  • 1 shows an exemplary diagram of an energy supply system according to the invention for island networks
  • 2 shows an exemplary diagram of an energy supply system according to the invention with loads on the primary system
  • FIG. 3 shows an example of a transformer device for coupling the primary and secondary systems
  • FIG. 4 shows an example of a transformer device for coupling the primary and secondary systems.
  • a generator 3 which is connected to the two three-phase systems la, lb, generates energy, for example, by burning diesel fuel.
  • the generator 3 has two three-phase winding systems, which are each assigned to the three-phase systems la or lb, voltages being induced in the winding systems and the winding systems being arranged spatially within the generator 3 such that the voltages of the two three-phase systems la, lb to one another are electrically out of phase.
  • converter transformers for generating the two three-phase systems can be dispensed with entirely or at least as far as possible.
  • the two three-phase systems la, lb together form the primary system 1.
  • the three-phase systems la, lb are preferably electrically out of phase by 30 ° and feed a secondary three-phase system 2 by means of at least one transformer device 4. In this way, current and voltage harmonics in the secondary system 2 are reduced.
  • the transformer device 4 comprises two transformers connected in parallel.
  • Loads can be connected to both the primary system 1 and the secondary system 2.
  • the generator 7 connected to the secondary system 2 can act as an emergency generator and both the energy supply ensure in the secondary system 2 as well as in the primary system 1 if the main generator 3 is not working.
  • FIG. 2 shows a further exemplary diagram of an energy supply system according to the invention, loads 6a, 6b being coupled to the primary system 1.
  • the generator 3 is connected to the two three-phase systems la, lb, which are preferably 30 ° out of phase with one another.
  • the two three-phase systems la, lb form the primary system 1.
  • the motors 6a, 6b are fed via the two converters 5a, 5b.
  • the primary system 1 is coupled to the secondary three-phase system 2 by means of the two transformers 4. Not shown in the drawing are further loads which can be connected to the primary system 1 in addition to the motors 6a, 6b. Further loads, not shown in the drawing, and at least one generator, not shown, are connected to the secondary three-phase system 2 via the connections 8a, 8b, 8c.
  • the construction of the generator 3 ensures that, especially when using loads suitable for oil drilling, such as the motors 6a, 6b, on the side of the stator windings connected to the three-phase systems la and lb, a uniform load distribution is ensured. Operation in the highest possible voltage level is expedient in primary system 1.
  • the secondary three-phase system 2 is coupled to the primary system 1 by the transformers 4 in a symmetrical manner.
  • the two transformers 4 have a delta connection on the primary side, but a delta or star connection on the secondary side.
  • FIG. 3 and 4 show further refinements of the transformer device 4 for coupling the primary system 1 to the secondary three-phase system 2.
  • the individual winding systems the transformer device 4 is assigned to the two primary three-phase systems la, lb and the secondary three-phase system 2 with the connections 8a, 8b, 8c.
  • the transformer devices 4 shown in FIG. 3 and FIG. 4 can be implemented as an integrated transformer device, ie they have only one winding system for each of the connections 8a, 8b, 8c on the secondary side, as shown schematically in the drawings.
  • the winding systems on the side of the secondary three-phase system 2 are arranged in a star connection.
  • the winding systems on the side of the secondary three-phase system 2 are arranged in a delta connection.
  • FIGS. 1 and 2 show elementary energy supply systems according to the invention for island networks. At least two such energy supply systems can be coupled together. It is also possible to couple at least one energy supply system according to the invention with already existing energy supply systems for an island network.
  • An energy supply system which consists of several elementary energy supply systems as shown in FIG. 1 or FIG. 2, can also be designed in such a way that in addition to the one main generator 3, further main generators 3 are provided in order to cover a correspondingly high energy requirement.
  • An energy supply system can also be constructed in such a way that it has a plurality of primary systems 1 that feed one or more secondary systems 2.
  • An energy supply system can be constructed such that a primary system 1 feeds one or more secondary three-phase systems 2 and / or a secondary three-phase system 2 is fed by one or more primary systems 1.
  • the energy supply system according to the invention is cheaper at least in terms of performance, flexibility and capacity in its entirety and has a significantly lower weight than previously existing systems, and moreover requires considerable power converters because of the savings otherwise required for the generation of two phase-shifted three-phase systems la, lb less space than currently existing systems.

Abstract

The invention relates to a power supply system for island networks, particularly on oil drilling platforms or boats. Said power supply system comprises at least one generator (3) and at least two three-phase AC systems (1a, 1b). The generator (3) is provided with at least two three-phase coiling systems, whereby the phase-displaced three-phase AC systems (1a, 1b) in which the coiling systems of the generator (3) are three-dimensionally disposed according to the phase displacement of the three-phase AC systems (1a, 1b) are fed without or essentially without using current-converting transformers. The two three-phase AC systems (1a, 1b) jointly form the primary system (1) while feeding a secondary three-phase AC system (2) by means of a transformer device (4). The inventive power supply system is compact and has a reduced weight, which is particularly important for island systems.

Description

Beschreibungdescription
Energieversorgungssystem für InselnetzeEnergy supply system for island grids
Die Erfindung betrifft ein Energieversorgungssystem für Inselnetze, wobei das Energieversorgungssystem mindestens einen Generator und mindestens zwei Drehstromsysteme aufweist.The invention relates to an energy supply system for island networks, the energy supply system having at least one generator and at least two three-phase systems.
Unter einem Energieversorgungssystem für Inselnetze ist ein ganzheitliches Energiesystem zu verstehen, also ein Energiesystem, in dem elektrische Energie erzeugt, übertragen und schließlich wieder in andere Energieformen umgewandelt wird, wobei das System von seinem Ausmaß räumlich begrenzt und - nicht mit einer landesweiten Energieversorgung vergleichbar ist. Derartige Systeme sind insbesondere auf See gebundenen und/oder beweglichen Einrichtungen vorzufinden. So z.B. auf Schiffen und sonstigen Seefahrzeugen, Bohrplattformen oder anderen isolierten, vorzugsweise seegebundenen technischen Einrichtungen mit Energiebedarf.An energy supply system for island grids is to be understood as a holistic energy system, i.e. an energy system in which electrical energy is generated, transmitted and finally converted back into other forms of energy, the system being spatially limited in size and not comparable to a nationwide energy supply. Such systems can be found, in particular, at sea-bound and / or movable devices. So e.g. on ships and other sea vehicles, drilling platforms or other isolated, preferably sea-bound technical facilities with energy requirements.
Gattungsgemäße Energieversorgungssysteme weisen oft mindestens zwei elektrisch phasenversetzte Drehstromsysteme auf, die mittels parallel geschalteter Umrichter Antriebe mit e- lektrischer Energie versorgen. Durch den Phasenversatz der Drehstromsysteme werden Strom- und Spannungsoberschwingungen reduziert. Gegenwärtig werden derartige versetzte Drehstromsysteme durch Stromrichtertransformatoren erzeugt, wobei der Phasenversatz der Drehstromsysteme durch entsprechende Wahl von Schaltgruppen bewirkt wird.Generic energy supply systems often have at least two electrically phase-shifted three-phase systems which supply drives with electrical energy by means of converters connected in parallel. The phase offset of the three-phase systems reduces current and voltage harmonics. Such offset three-phase systems are currently produced by converter transformers, the phase shift of the three-phase systems being effected by appropriate selection of switching groups.
Bei den zuvor beschriebenen Energieversorgungssystemen für Inselnetze und insbesondere auf See stellt das hohe Gewicht der verwendeten Systemkomponenten ein gravierendes Problem dar. Gegenwärtig existieren daher verschiedene Lösungsansät- ze, die versuchen zum System gehörige Vorrichtungen wieThe high weight of the system components used represents a serious problem in the energy supply systems for island networks and in particular at sea described above. At present, therefore, there are various solution approaches which try devices belonging to the system, such as
Stromrichtertransformatoren und Umrichter hinsichtlich ihres Gewichts zu optimieren. Aufgabe der Erfindung ist es, ein Energieversorgungssystem für Inselnetze, das mindestens einen Generator und mindestens zwei Drehstromsysteme aufweist, insbesondere im Hinblick auf die zuvor beschriebene Problemstellung weiter zu verbessern.Optimizing converter transformers and converters with regard to their weight. The object of the invention is to further improve an energy supply system for island grids which has at least one generator and at least two three-phase systems, in particular with regard to the problem described above.
Erfindungsgemäß wird dies dadurch erreicht, dass der Generator des Energieversorgungssystems mindestens zwei dreiphasige Wicklungssysteme aufweist, die jeweils den Drehstromsystemen zugeordnet sind, wobei in den Wicklungssystemen Spannungen induziert werden und die Wicklungssysteme des Generators räumlich derart angeordnet sind, dass die Spannungen der beiden Drehstromsysteme zueinander elektrisch phasenversetzt sind.This is achieved according to the invention in that the generator of the energy supply system has at least two three-phase winding systems, each of which is assigned to the three-phase system, voltages being induced in the winding systems and the winding systems of the generator being spatially arranged such that the voltages of the two three-phase systems are electrically phase-shifted from one another are.
Dadurch, dass erfindungsgemäß auf Stromrichtertransformatoren zur Erzeugung der beiden Drehstromsysteme gänzlich bzw. zumindest weitestgehend verzichtet wird, ergibt sich ein erheblicher Gewichts- und Kostenvorteil und es wird zudem auch Platz eingespart.The fact that, according to the invention, converter transformers for generating the two three-phase systems are completely or at least largely dispensed with, there is a considerable weight and cost advantage and space is also saved.
Mit Vorteil beträgt der elektrische Phasenversatz zwischen den Drehstromsystemen 30°. Dieser Phasenversatz ist hinsichtlich der Verminderung von Strom- und Spannungsoberschwingungen in einem ggf. nachgeschalteten mittels parallel geschal- teter Umrichter gespeisten weiteren Drehstromsystems besonders günstig.The electrical phase offset between the three-phase systems is advantageously 30 °. This phase shift is particularly favorable with regard to the reduction of current and voltage harmonics in a further three-phase system which may be connected downstream and is connected by means of converters connected in parallel.
Vorzugsweise sind die Wicklungssysteme des Generators derart in Nuten angebracht, dass sich ein minimaler Kurzschlussstrom einstellt. Auf diese Weise wird eine unerwünschte Energiezufuhr durch statorseitige magnetische Kopplung der Wicklungssysteme im Generator deutlich gemindert.The winding systems of the generator are preferably installed in slots in such a way that a minimal short-circuit current is established. In this way, unwanted energy supply is significantly reduced by stator-side magnetic coupling of the winding systems in the generator.
Es ist zweckmäßig, dass eine Last mit mehr als einem der Drehstromsysteme verbunden ist. Gerade beim Vorhandensein von mehr als zwei bzw. einem Vielfachen von zwei Drehstro syste- men kann auf diese Weise ein Verlust von Redundanz im System vermieden werden.It is appropriate for a load to be connected to more than one of the three-phase systems. Especially when there are more than two or a multiple of two rotary power systems A loss of redundancy in the system can be avoided in this way.
Mit Vorteil weist das Energieversorgungssystem mindestens ein Primärsystem und mindestens ein sekundäres Drehstromsystem auf, wobei mindestens zwei Drehstromsysteme das Primärsystem bilden, das mit mindestens einem der sekundären Drehstromsysteme gekoppelt ist. Auf diese Weise können im Primär- und Sekundärsystem unterschiedliche Einrichtungen zum Schalten und/oder Umrichten verwendet werden, die auf unterschiedliche Spannungsbereiche ausgelegt sind. Die Auslegung auf Spannungsbereiche wird dabei jeweils vorzugsweise durch die zu versorgenden Lasten bestimmt. Insgesamt ergibt sich hiermit ein Kostenvorteil, da ggf. günstigere Einrichtungen für nied- rigere Spannungsbereiche verwendet werden können.The energy supply system advantageously has at least one primary system and at least one secondary three-phase system, at least two three-phase systems forming the primary system, which is coupled to at least one of the secondary three-phase systems. In this way, different switching and / or converting devices that are designed for different voltage ranges can be used in the primary and secondary system. The design for voltage ranges is preferably determined by the loads to be supplied. Overall, this results in a cost advantage since, if necessary, cheaper devices can be used for lower voltage ranges.
Vorteilhafterweise ist das sekundäre Drehstromsystem mit einem Generator gekoppelt. So wird erreicht, dass Lasten am Sekundär- bzw. Primärsystem auch dann mit Energie versorgt wer- den können, wenn bei der Energieerzeugung im jeweils anderen System Störungen auftreten.The secondary three-phase system is advantageously coupled to a generator. This ensures that loads on the secondary or primary system can also be supplied with energy if faults occur in the other system when generating energy.
Vorzugsweise ist die Kopplung zwischen mindestens einem Primärsystem und mindestens einem sekundären Drehstromsystem derart ausgestaltet, dass mittels des mit dem sekundärenThe coupling between at least one primary system and at least one secondary three-phase system is preferably designed in such a way that by means of the secondary system
Drehstromsystem gekoppelten Generators erzeugte Energie dem Primärsystem zugeführt werden kann. Auf diese Weise kann ein mit dem Sekundärsystem verbundener Generator in Notfällen auch mit dem Primärsystem verbundene Lasten mit Energie ver- sorgen.Three-phase system coupled generator generated energy can be fed to the primary system. In this way, a generator connected to the secondary system can also supply loads connected to the primary system with energy in emergencies.
Ausführungsbeispiele und weitere Vorteile der Erfindung werden anhand der beigefügten Zeichnung erläutert. Dabei zeigenExemplary embodiments and further advantages of the invention are explained with reference to the attached drawing. Show
FIG 1 ein beispielhaftes Schema eines erfindungsgemäßen E- nergieversorgungssystems für Inselnetze; FIG 2 ein beispielhaftes Schema eines erfindungsgemäßen E- nergieversorgungssystems mit Lasten am Primärsystem;1 shows an exemplary diagram of an energy supply system according to the invention for island networks; 2 shows an exemplary diagram of an energy supply system according to the invention with loads on the primary system;
FIG 3 ein Beispiel für eine Transformatorvorrichtung zur Kopplung von Primär- und Sekundärsystem;3 shows an example of a transformer device for coupling the primary and secondary systems;
FIG 4 ein Beispiel für eine Transformatorvorrichtung zur Kopplung von Primär- und Sekundärsystem.4 shows an example of a transformer device for coupling the primary and secondary systems.
FIG 1 zeigt ein beispielhaftes Schema eines erfindungsgemäßen Energieversorgungssystems für Inselnetze. Dabei erzeugt ein Generator 3, der mit den beiden Drehstromsystemen la, lb verbunden ist, Energie beispielsweise durch Verbrennung von Dieselkraftstoff. Der Generator 3 weist dabei zwei dreiphasige Wicklungssysteme auf, die jeweils den Drehstromsystemen la bzw. lb zugeordnet sind, wobei in den Wicklungssystemen Spannungen induziert werden und die Wicklungssysteme innerhalb des Generators 3 räumlich derart angeordnet sind, dass die Spannungen der beiden Drehstromsysteme la, lb zueinander e- lektrisch phasenversetzt sind. So kann auf Stromrichtertransformatoren zur Erzeugung der beiden Drehstromsysteme gänzlich bzw. zumindest weitestgehend verzichtet werden.1 shows an exemplary diagram of an energy supply system according to the invention for island networks. A generator 3, which is connected to the two three-phase systems la, lb, generates energy, for example, by burning diesel fuel. The generator 3 has two three-phase winding systems, which are each assigned to the three-phase systems la or lb, voltages being induced in the winding systems and the winding systems being arranged spatially within the generator 3 such that the voltages of the two three-phase systems la, lb to one another are electrically out of phase. In this way, converter transformers for generating the two three-phase systems can be dispensed with entirely or at least as far as possible.
Die beiden Drehstromsysteme la, lb bilden gemeinsam das Pri- märsystem 1. Vorzugsweise sind die Drehstromsysteme la, lb um 30° elektrisch phasenversetzt und speisen mittels mindestens einer Transformatorvorrichtung 4 ein sekundäres Drehstromsystem 2. So werden Strom- und Spannungsoberschwingungen im Sekundärsystem 2 reduziert. Im in FIG 1 gezeigten Ausführungs- beispiel umfasst die Transformatorvorrichtung 4 zwei parallel geschaltete Transformatoren.The two three-phase systems la, lb together form the primary system 1. The three-phase systems la, lb are preferably electrically out of phase by 30 ° and feed a secondary three-phase system 2 by means of at least one transformer device 4. In this way, current and voltage harmonics in the secondary system 2 are reduced. In the exemplary embodiment shown in FIG. 1, the transformer device 4 comprises two transformers connected in parallel.
Sowohl an das Primärsystem 1 als auch an das Sekundärsystem 2 können in der Zeichnung nicht dargestellte Lasten wie z.B. Motoren oder andere Antriebseinrichtungen angeschlossen werden. Der mit dem Sekundärsystem 2 verbundene Generator 7 kann als Notgenerator fungieren und die Energieversorgung sowohl im Sekundärsystem 2 als auch im Primärsystem 1 gewährleisten, falls der Hauptgenerator 3 nicht arbeitet.Loads, not shown in the drawing, such as motors or other drive devices, can be connected to both the primary system 1 and the secondary system 2. The generator 7 connected to the secondary system 2 can act as an emergency generator and both the energy supply ensure in the secondary system 2 as well as in the primary system 1 if the main generator 3 is not working.
FIG 2 zeigt ein weiteres beispielhaftes Schema eines erfin- dungsgemäßen Energieversorgungssystems, wobei an das Primärsystem 1 Lasten 6a, 6b gekoppelt sind. Der Generator 3 ist mit den beiden Drehstromsystemen la, lb verbunden, die vorzugsweise 30° zueinander phasenversetzt sind. Die beiden Drehstromsysteme la, lb bilden das Primärsystem 1. Über die beiden Umrichter 5a, 5b werden die Motoren 6a, 6b gespeist.2 shows a further exemplary diagram of an energy supply system according to the invention, loads 6a, 6b being coupled to the primary system 1. The generator 3 is connected to the two three-phase systems la, lb, which are preferably 30 ° out of phase with one another. The two three-phase systems la, lb form the primary system 1. The motors 6a, 6b are fed via the two converters 5a, 5b.
Das Primärsystem 1 ist mit dem sekundären Drehstromsystem 2 mittels der beiden Transformatoren 4 gekoppelt. In der Zeichnung nicht dargestellt sind weitere Lasten, die zusätzlich zu den Motoren 6a, 6b mit dem Primärsystem 1 verbunden werden können. Mit dem sekundären Drehstromsystem 2 sind über die Anschlüsse 8a, 8b, 8c weitere in der Zeichnung nicht näher dargestellte Lasten und mindestens ein nicht näher dargestellter Generator verbunden.The primary system 1 is coupled to the secondary three-phase system 2 by means of the two transformers 4. Not shown in the drawing are further loads which can be connected to the primary system 1 in addition to the motors 6a, 6b. Further loads, not shown in the drawing, and at least one generator, not shown, are connected to the secondary three-phase system 2 via the connections 8a, 8b, 8c.
Beim Ausführungsbeispiel gemäß FIG 2 wird durch die Konstruktion des Generators 3 sichergestellt, dass vor allem beim Einsatz von zur Ölbohrung geeigneten Lasten, wie den Motoren 6a, 6b auf Seite der mit den Drehstromsystemen la und lb ver- bundenen Statorwicklungen eine gleichmäßige Lastverteilung gewährleistet ist. Dabei ist im Primärsystem 1 der Betrieb bei höchstmöglichem Spannungsniveau zweckmäßig.In the exemplary embodiment according to FIG. 2, the construction of the generator 3 ensures that, especially when using loads suitable for oil drilling, such as the motors 6a, 6b, on the side of the stator windings connected to the three-phase systems la and lb, a uniform load distribution is ensured. Operation in the highest possible voltage level is expedient in primary system 1.
Die Kopplung des sekundären Drehstromsystems 2 an das Primär- system 1 erfolgt durch die Transformatoren 4 in symmetrischer Weise. Beispielsweise weisen dabei die beiden Transformatoren 4 primärseitig eine Dreiecks-, sekundärseitig jedoch eine Dreiecks- bzw. eine Sternschaltung auf.The secondary three-phase system 2 is coupled to the primary system 1 by the transformers 4 in a symmetrical manner. For example, the two transformers 4 have a delta connection on the primary side, but a delta or star connection on the secondary side.
FIG 3 und FIG 4 zeigen weitere Ausgestaltungen der Transformatorvorrichtung 4 zur Kopplung des Primärsystems 1 mit dem sekundären Drehstromsystem 2. Die einzelnen Wicklungssysteme der Transformatorvorrichtung 4 sind dabei den beiden primären Drehstromsystemen la, lb bzw. dem sekundären Drehstromsystem 2 mit den Anschlüssen 8a, 8b, 8c zugeordnet. Die in FIG 3 und FIG 4 gezeigten Transformatorvorrichtungen 4 sind als integ- rierte Transformatorvorrichtung ausführbar, d.h. sie weisen sekundärseitig für jeden der Anschlüsse 8a, 8b, 8c wie in den Zeichnungen schematisch dargestellt jeweils nur ein Wicklungssystem auf.3 and 4 show further refinements of the transformer device 4 for coupling the primary system 1 to the secondary three-phase system 2. The individual winding systems the transformer device 4 is assigned to the two primary three-phase systems la, lb and the secondary three-phase system 2 with the connections 8a, 8b, 8c. The transformer devices 4 shown in FIG. 3 and FIG. 4 can be implemented as an integrated transformer device, ie they have only one winding system for each of the connections 8a, 8b, 8c on the secondary side, as shown schematically in the drawings.
Bei der in FIG 3 gezeigten Transformatorvorrichtung 4 sind die Wicklungssysteme auf Seite des sekundären Drehstromsystems 2 in Sternschaltung angeordnet.In the transformer device 4 shown in FIG 3, the winding systems on the side of the secondary three-phase system 2 are arranged in a star connection.
Bei der in FIG 4 gezeigten Transformatorvorrichtung 4 sind die Wicklungssysteme auf Seite des sekundären Drehstromsystems 2 in Dreiecksschaltung angeordnet.In the transformer device 4 shown in FIG. 4, the winding systems on the side of the secondary three-phase system 2 are arranged in a delta connection.
FIG 1 und 2 zeigen erfindungsgemäße elementare Energieversorgungssysteme für Inselnetze. Mindestens zwei derartige Ener- gieversorgungssysteme können miteinander gekoppelt werden. Es ist auch möglich mindestens ein erfindungsgemäßes Energieversorgungssystem mit bereits existierenden Energieversorgungssystemen für ein Inselnetz zu koppeln.1 and 2 show elementary energy supply systems according to the invention for island networks. At least two such energy supply systems can be coupled together. It is also possible to couple at least one energy supply system according to the invention with already existing energy supply systems for an island network.
Ein Energieversorgungssystem, das aus mehreren wie in FIG 1 bzw. FIG 2 gezeigten elementaren Energieversorgungssystemen besteht, kann um einen entsprechend hohen Energiebedarf zu decken, auch derart ausgestaltet sein, dass zusätzlich zum einen Hauptgenerator 3 noch weitere Hauptgeneratoren 3 vorge- sehen sind. Ein Energieversorgungssystem kann auch derartig aufgebaut sein, dass es mehrere Primärsysteme 1 aufweist, die ein oder mehrere Sekundärsysteme 2 speisen. Ein Energieversorgungssystem kann derartig aufgebaut sein, dass ein Primärsystem 1 ein oder mehrere sekundäre Drehstromsysteme 2 speist und/oder ein sekundäres Drehstromsystem 2 durch ein oder mehrere Primärsysteme 1 gespeist wird. Das erfindungsgemäße Energieversorgungssystem ist bei mindestens gleichbleibender Leistung, Flexibilität und Kapazität in seiner Gesamtheit billiger und weist ein deutlich geringeres Gewicht auf als bisher existierende Systeme, und benötigt darüber hinaus auch aufgrund der Einsparung von sonst zur Erzeugung von zwei phasenversetzten Drehstromsystemen la, lb benötigten Stromumrichtern deutlich weniger Platz als gegenwärtig existierende Systeme. An energy supply system, which consists of several elementary energy supply systems as shown in FIG. 1 or FIG. 2, can also be designed in such a way that in addition to the one main generator 3, further main generators 3 are provided in order to cover a correspondingly high energy requirement. An energy supply system can also be constructed in such a way that it has a plurality of primary systems 1 that feed one or more secondary systems 2. An energy supply system can be constructed such that a primary system 1 feeds one or more secondary three-phase systems 2 and / or a secondary three-phase system 2 is fed by one or more primary systems 1. The energy supply system according to the invention is cheaper at least in terms of performance, flexibility and capacity in its entirety and has a significantly lower weight than previously existing systems, and moreover requires considerable power converters because of the savings otherwise required for the generation of two phase-shifted three-phase systems la, lb less space than currently existing systems.

Claims

Patentansprüche claims
1. Energieversorgungssystem für Inselnetze, das mindestens einen Generator (3) und mindestens zwei Drehstromsysteme (la, lb) aufweist, d a d u r c h g e k e n n z e i c h n e t , dass der Generator (3) mindestens zwei dreiphasigen Wicklungssysteme aufweist, die jeweils den Drehstromsystemen (la, lb) zugeordnet sind, wobei in den Wicklungssystemen Spannungen induziert werden und die Wicklungssysteme des Generators (3) räumlich derart angeordnet sind, dass die Spannungen der beiden Drehstromsysteme (la, lb) zueinander elektrisch phasenversetzt sind.1. Energy supply system for island grids, which has at least one generator (3) and at least two three-phase systems (la, lb), characterized in that the generator (3) has at least two three-phase winding systems, which are each assigned to the three-phase systems (la, lb), wherein voltages are induced in the winding systems and the winding systems of the generator (3) are spatially arranged such that the voltages of the two three-phase systems (la, lb) are electrically out of phase with one another.
2. Energieversorgungssystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass der elektrische Phasenversatz zwischen den Drehstromsystemen (la, lb) 30° beträgt2. Energy supply system according to claim 1, so that the electrical phase offset between the three-phase systems (la, lb) is 30 °
3. Energieversorgungssystem nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , dass die Wicklungssysteme des Generators (3) derart in Nuten angebracht sind, dass sich ein minimaler Kurzschlussstrom einstellt.3. Energy supply system according to claim 1 or 2, so that the winding systems of the generator (3) are mounted in slots in such a way that a minimal short-circuit current is established.
4. Energieversorgungssystem nach einem der vorstehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass eine Last (6a, 6b) mit mehr als einem der Drehstromsysteme (la, lb) verbunden ist.4. Power supply system according to one of the preceding claims, that a load is connected to a load (6a, 6b) with more than one of the three-phase systems (la, lb).
5. Energieversorgungssystem nach einem der vorstehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass es mindestens ein Primärsystem (1) und mindestens ein sekundäres Drehstromsystem (2) aufweist, wobei mindestens zwei Drehstromsysteme (la, lb) das Primärsystem (1) bilden, das mit mindestens einem der sekundären Drehstromsysteme (2) gekoppelt ist.5. Power supply system according to one of the preceding claims, characterized in that it has at least one primary system (1) and at least one secondary three-phase system (2), wherein at least two three-phase systems (la, lb) form the primary system (1) with at least one of the secondary three-phase systems (2) is coupled.
6. Energieversorgungssystem nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , dass das sekundäre Drehstromsystem (2) mit einem Generator gekoppelt ist .6. The energy supply system according to claim 5, wherein the secondary three-phase system (2) is coupled to a generator.
7. Energieversorgungssystem nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , dass die7. Power supply system according to claim 6, d a d u r c h g e k e n n z e i c h n e t that the
Kopplung zwischen mindestens einem Primärsystem (1) und mindestens einem sekundären Drehstromsystem (2) derart ausgestaltet ist, dass mittels des mit dem sekundären Drehstromsystem (2) gekoppelten Generators erzeugte Energie dem Primär- system (1) zugeführt werden kann. Coupling between at least one primary system (1) and at least one secondary three-phase system (2) is designed such that energy generated by means of the generator coupled to the secondary three-phase system (2) can be supplied to the primary system (1).
PCT/DE2003/001397 2002-05-08 2003-04-30 Power supply system for island networks WO2003096511A1 (en)

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JP2004504367A JP3987529B2 (en) 2002-05-08 2003-04-30 Power supply system for isolated network
AU2003232617A AU2003232617A1 (en) 2002-05-08 2003-04-30 Power supply system for island networks
KR1020047017907A KR101027301B1 (en) 2002-05-08 2003-04-30 Power supply system for island networks
NO20045340A NO328312B1 (en) 2002-05-08 2004-12-06 Energy supply system for eye networks

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DE10220738A DE10220738A1 (en) 2002-05-08 2002-05-08 Energy supply system for island grids

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CN (1) CN100416969C (en)
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NO (1) NO328312B1 (en)
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CN105337397B (en) * 2014-06-18 2019-03-29 通用电气公司 Drilling system and its method of supplying power to
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DE10220738A1 (en) 2003-11-27
KR101027301B1 (en) 2011-04-06
AU2003232617A1 (en) 2003-11-11
RU2004135822A (en) 2005-08-27
JP2005525074A (en) 2005-08-18
CN100416969C (en) 2008-09-03
JP3987529B2 (en) 2007-10-10
KR20040106492A (en) 2004-12-17
RU2318283C2 (en) 2008-02-27
NO20045340L (en) 2005-02-04
CN1653667A (en) 2005-08-10
NO328312B1 (en) 2010-01-25

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